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Old 5th August 2008, 09:30 PM   #11
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Old 5th August 2008, 11:37 PM   #12
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Space2000,
What PS rail voltage are you running to get 100+ watts?
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Old 6th August 2008, 12:01 AM   #13
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i am running on 45vdc as nelson recomended.

very powerfull as i am using my big speaker 8ohms. if you use 8ohms it will get less heat then 4 ohms speaker.

i tested both. now i found best is 8ohms.
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Old 6th August 2008, 12:05 AM   #14
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i have question for this amp. is this single ended or push pull?

** This amp can triger to class AB, if its goes wrong?
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Old 6th August 2008, 02:31 AM   #15
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The gain devices in the output stage are single-ended, but the
current source feeding them is modulated to provide 50% of the
output variation. The closest topologies are the SEPP and SRPP
topologies from the old tube days.

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Old 7th August 2008, 04:56 AM   #16
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having some problem, when i use two channel as R-L. its like cliping sound comming with it. at first i used one transformer for two channel now even i tested using indivisual transformer power supply. still having same problem, if i use only one channel its working fine. when i use two channel R-L then cliping sound comming.

how can i solve this?
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Old 7th August 2008, 05:41 PM   #17
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What do you mean when you say "two channel as R-L"?
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Old 7th August 2008, 09:52 PM   #18
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Quote:
Originally posted by Nelson Pass
What do you mean when you say "two channel as R-L"?
thank you nelson,

R-L means Right and left channel.

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Old 8th August 2008, 01:12 AM   #19
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What size capacitors are you using in the power supply? To me, it looks a little undersized. If you are using it single-ended, you need to ground the negative input too.
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Old 8th August 2008, 05:53 AM   #20
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i used 4700uf X 20pcs on each psu so total 94000uf for + - each channel. two channel is 94000uf X 2. it should be enough right?

i am using single ended....here is the circuit.
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